^^
well, yes im a Norton nono-lover (to put it in the meaningful terms)
come on buddy, I hv analysed AVs and Firewalls and ISS (internet security systems), IDSes (Intrusion detection systems) for as much as 5 years and hv used alot of systems than many of us here can think of... (not bragging abt myself in any such way plz..)
I am jus trying to be straight and simple to direct the guy in the right path..

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The most stable AVs/ISSes are: (with no priority in listing)
1.) Kaspersky
2.) AVG
3.) NOD32
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I was a Norton lover (at that point in time) wen the only name tat every one knew wen it came to Antivirus or security for that matter was : Norton/ Symantec....
It does hv a lot of features and processes, i dnt doubt that, nor i doubt the detection capability of Norton. but wat is the use if the only thing u can use beside running Norton (during a normal scan too..) on ur low end system is jus a screensaver and everything jus chokes for processor time..?? is tat really tat useful in a processor/time saving way..?? naa i dnt think tat.. so jus ponder on that thought..

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Neways... i recommended wat i hv used and yes, do get ur facts right buddy, KIS or NOD32 or AVG are not at all resource hogs, but Norton tops the list... for sure..

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Cheers n e-peace.....